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Optical Fiber Communications Conference and Exhibition (OFC)

作者： Wang, Cen Wakayama, Yuta Yoshikane, Noboru Tsuritani, Takehiro KDDI Res Inc Photon Transport Network Lab Saitama 3568502 Japan

We propose an integrated control mechanism of optical circuit switching for both general data center traffics and deep distributed learning applications. Semi-physical evaluations show a relative throughput of 1.27 an... 详细信息

ISBN: (纸本)9798350377583

关键词： assignment algorithms Circuit switching Deep learning Machine learning Optical circuits Packet switching

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XLRON: Accelerated Reinforcement Learning Environments for Optical Networks

XLRON: Accelerated Reinforcement Learning Environments for O...

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Optical Fiber Communications Conference and Exhibition (OFC)

作者： Doherty, Michael Beghelli, Alejandra Univ Coll London UCL Opt Networks Grp Roberts Bldg Torrington Pl London WC1E 7JE England

We present XLRON: an open source project enabling, for the first time, GPU-accelerated reinforcement learning on optical network problems. We demonstrate 1001000x speed-up in training time over similar tools, thereby ... 详细信息

ISBN: (纸本)9798350377583

关键词： assignment algorithms Modulation Network topology Neural networks Optical networks Wavelength assignment

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Optimizing Key Consumption in Switched QKD Networks

Optimizing Key Consumption in Switched QKD Networks

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Optical Fiber Communications Conference and Exhibition (OFC)

作者： Christodoulopoulos, K. Makris, N. Kanellos, G. T. Syvridis, D. Univ Athens Dept Informat & Telecommun Athens Greece

We consider a switched QKD network and develop a novel scheduling algorithm that periodically configures the QKD links to optimize the generation and buffering of keys to maximize the key consumption rate across the n... 详细信息

ISBN: (纸本)9798350377583

关键词： assignment algorithms Attenuation coefficient Network topology Networking hardware Quantum key distribution Quantum key distribution networks

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Port-Agnostic Path Establishment with Point-to-Multipoint Control of Remote User Terminals for Metro/Access-Integrated All-Photonics Network

Port-Agnostic Path Establishment with Point-to-Multipoint Co...

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Optical Fiber Communications Conference and Exhibition (OFC)

作者： Igarashi, Ryo Kaneko, Shin Kimura, Yasutaka Shibata, Naotaka Suzuki, Takahiro Fujiwara, Masamichi Kani, Jun-ichi Yoshida, Tomoaki NTT Corp NTT Access Network Serv Syst Labs 1-1 Hikari No Oka Yokosuka Kanagawa 2390847 Japan

ISBN: (纸本)9798350377583

We propose a port-agnostic initial-connection sequence allowing simultaneous connection of multiple user terminals (UTs), and demonstrate end-to-end wavelength-path and fiber-path establishment for DWDM and non-DWDM UTs through point-to-multipoint-type remote UT control in Metro/Access-Integrated All-Photonics Network. (c) 2024 The Author(s)

关键词： assignment algorithms Modulation Multiplexing Optical systems Switching Wavelength assignment

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On the complexity of configuration and orchestration for enabling disaggregated server provisioning in optical composable data centers

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JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING 2022年第12期14卷 998-1009页

作者： Pages, Albert Agraz, Fernando Spadaro, Salvatore Univ Politecn Catalunya UPC Opt Commun Grp GCO Barcelona Spain

Due to the limitations of traditional data center (DC) architectures, the concept of infrastructure disaggregation has been proposed. DC resources are separated into multiple blades to be exploited independently. As a result, composable DC (CDC) infrastructures are achieved, enhancing the modularity of resource provisioning. However, disaggregation introduces additional challenges that need to be carefully analyzed. One relates to the potential complexity increase on the orchestration and infrastructure configuration that need to be performed when provisioning resources to support services. This aspect is highly influenced by the distribution of resources at the physical infrastructure. As such, when analyzing the performance of a CDC, it becomes essential to also study the related operational complexity of the resource orchestration and configuration phases. Furthermore, the requirements of several tenant services may impose heterogeneous deployments over the shared physical infrastructure in the form of either disaggregated single-server or multi-server distributions. The associated orchestration/configuration cost is again highly influenced by the data plane architecture of the CDC. With these aspects in mind, in this paper, we provide a methodology for analysis of the complexity of resource orchestration for a service deployment and the associated configuration cost in optical CDCs, considering various service deployment setups. A selected set of CDC architectures found in the literature is employed to quantitatively illustrate how the data plane design and service deployment strategies affect the complexity of infrastructure configuration and resource orchestration. (c) 2022 Optica Publishing Group

关键词： assignment algorithms Capacity limits Network convergence Network topology Networking hardware Optical networks

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Recursive first fit: a highly parallel optimal solution to spectrum allocation

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JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING 2022年第3期14卷 165-176页

作者： Rouskas, George N. Bandikatla, Chaitanya North Carolina State Univ Dept Comp Sci Raleigh NC 27695 USA

We revisit the classical spectrum allocation (SA) problem, a fundamental subproblem in optical network design, and make three contributions. First, we show how some SA problem instances may be decomposed into smaller instances that may be solved independently without loss of optimality. Second, we prove an optimality property of the well-known first-fit (FF) heuristic. Finally, we leverage this property to develop a recursive and parallel algorithm that applies the FF heuristic to find an optimal solution efficiently. This recursive FF algorithm is highly scalable because of two unique properties: (1) it completely sidesteps the symmetry inherent in SA and hence drastically reduces the solution space compared to typical integer linear programming formulations, and (2) the solution space can be naturally decomposed in non-overlapping subtrees that may be explored in parallel almost independently of each other, resulting in faster than linear speedup. (C) 2022 Optica Publishing Group

关键词： assignment algorithms Network survivability Network topology Optical networks Routing algorithms Wavelength assignment

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Benefits of counterpropagating Raman amplification for multiband optical networks

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JOURNAL OF OPTICAL COMMUNICATIONS AND NETWORKING 2022年第7期14卷 562-571页

作者： Souza, Andre Costa, Nelson Pedro, Joao Pires, Joao Infinera Unipessoal Lda P-2790078 Carnaxide Portugal Inst Super Tecn Inst Telecomunicacoes P-1049001 Lisbon Portugal

Multiband (MB) optical fiber transmission systems can unlock additional capacity in existing optical fiber infrastructures, enabling them to keep up with the increase in traffic demand while postponing costly optical fiber deployments. However, due to the worse transmission characteristics of MB systems than C-band-only transmission, the network's overall spectral efficiency decreases when increasing the transmission bandwidth. The extent of this performance degradation is paramount to determining the commercial viability of deploying MB systems. By estimating the generalized signal-to-noise ratio using the GNPy library, this work analyzes the impact of using counterpropagating Raman amplification to improve the performance of an S + C + L-band transmission system comprising a total bandwidth of 15.5 THz. Raman amplification is proposed to mitigate the worse system performance resulting from the stimulated Raman scattering effect and the worse noise figure of the S-band optical amplifier. We show that the optimized deployment of a counterpropagating Raman pump makes it possible not only to improve but also to equalize the network-wide optical performance of the S + C + L-band transmission system, which potentially reduces the complexity of routing and wavelength assignment algorithms. The capacity, spectral efficiency, and number of feasible lightpaths of the S + C + L-band system are compared with C- and C + L-band systems with and without Raman amplification on two reference networks. Results show that the spectral efficiency of the S + C + L-band system with Raman amplification is similar to the C-band-only system without Raman amplification. These results provide evidence that this strategy can be effectively used to compensate for the worse transmission characteristics of MB systems, the higher noise figure of the S-band optical amplifier, the SRS effect, and the additional losses from the band demultiplexer and coupler required at every amplification stage to

关键词： assignment algorithms Optical amplifiers Optical networks Stimulated Raman scattering Stimulated scattering Wavelength assignment

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Quantum batteries in non-Markovian reservoirs

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OPTICS LETTERS 2022年第21期47卷 5614-5617页

作者： Li, J. L. Shen, H. Z. Yi, X. X. Northeast Normal Univ Ctr Quantum Sci Changchun 130024 Peoples R China Northeast Normal Univ Sch Phys Changchun 130024 Peoples R China Northeast Normal Univ Ctr Adv Optoelect Funct Mat Res Changchun 130024 Peoples R China Northeast Normal Univ Key Lab UV Light Emitting Mat & Technol Minist Educ Changchun 130024 Peoples R China

In this Letter, we propose schemes to improve the per-formance of quantum batteries and provide a new, to the best of our knowledge, quantum source for a quantum bat-tery without an external driving field. We show that the memory effect of the non-Markovian reservoir can play a significant role in improving the performance of quan-tum batteries, which originates from a backflow on the ergotropy in the non-Markovian regime, while there is counterpart in Markovian approximation. We find that the peak for the maximum average storing power in the non-Markovian regime can be enhanced by manipulating the coupling strength between the charger and the battery. Finally, we find that the battery can also be charged by non rotating wave terms without driving fields. (c) 2022 Optica Publishing Group

关键词： Anisotropy assignment algorithms Coherence Excitons Photons Two level systems

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Deep Neural Network-enabled Fast and Large-Scale QoT Estimation for Dynamic C plus L-Band Mesh Networks

Deep Neural Network-enabled Fast and Large-Scale QoT Estimat...

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Optical Fiber Communications Conference and Exhibition (OFC)

作者： Zhang, Yao Song, Yuchen Shi, Yan Li, Jin Zhang, Chuanbiao Tang, Yu Zhang, Min Wang, Danshi Beijing Univ Posts & Telecommun BUPT State Key Lab Informat Photon & Opt Commun Beijing Peoples R China China Unicom Res Inst Beijing Peoples R China China United Network Commun Grp Co Ltd Beijing Peoples R China

A fast and accurate QoT estimation scheme using deep neural network is proposed for dynamic C+L-band large-scale mesh networks. The calculation time is decreased dramatically and it is applied to measure the fiber bro... 详细信息

ISBN: (纸本)9781957171180

关键词： assignment algorithms Fiber optic amplifiers Network topology Neural networks Optical networks Raman scattering

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Quantum speed limit time of an open two-level atom with counter-rotating terms

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Journal of the Optical Society of America B 2025年第6期42卷 1350-1356页

作者： Kalim Ullah Khan Salman Khan COMSATS University Islamabad Park Road Tarlai Kalan Islamabad 45550 Pakistan

Dynamics of quantum speed limit (QSL) time, under the scenario of frequent measurements on the system, of a two-level atom interacting with the vacuum electromagnetic field without the rotating wave approximation (RWA) are studied. The effects of three different interacting spectra, namely, super-ohmic, ohmic, and sub-ohmic, are analyzed. The behavior of QSL time shows control switching from quantum Zeno effect (QZE) to quantum anti-Zeno effect (QAZE) for certain choices of the parameter space of the Hamiltonian of the system. Graphical analysis of our results shows that the super-ohmic spectrum might be a better choice for certain quantum information tasks than the other two spectra considered here.

关键词： assignment algorithms Quantum computation Quantum information Quantum metrology Switching Two level systems

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